Cost Breakdown and Options for Garage Conversion

Converting a garage into an ADU in Los Angeles can range from $60,000 to over $150,000, with the cost per square foot typically between $240 and $400. Here’s a simple breakdown of the key expenses:

Construction Costs

Expect to spend around $150 per square foot for construction. This covers the labor and materials needed for the conversion.

Architectural Plans

Architectural plans for your garage conversion usually cost between $6,000 and $20,000. This includes designing the plans, ensuring they meet local regulations, and getting city approval.

Types of Garage Conversions and Associated Costs

Standard Conversion. Estimated Budget: $80,000+
This involves minimal changes to the existing garage structure. It focuses on making the space functional without expanding or altering the original structure.

Enhanced Conversion (with Structural Upgrades). Estimated Cost: $120,000 or more
This option adds features like a full bathroom, a larger kitchen, and separate utility services. It may also require structural changes, like altering the roof, to create a more spacious and luxurious living area.

Premium Rebuild. Estimated Cost: $175,000 or above
This involves demolishing the existing garage and rebuilding it with a larger floor plan or an additional story. It allows for a customized design and can significantly increase property value, making it ideal for a home office or guest suite.

Cali ADU Design+Build

Cost of Converting Different-Sized Garages

Two-Car Garage Conversion
This typically costs between $100,000 and $160,000. The final price depends on factors like the garage’s condition, how close it is to utilities, and the choice of finishing materials.

Three-Car Garage Conversion
Generally starts around $150,000 and can go up to $200,000 or more. Costs vary based on the garage’s condition, accessibility to utilities, and the materials you select.

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Considerations for Converting Your Garage into a Unit or an ADU

Garage Foundation

Older garage foundations might not meet today’s standards. The city may require an inspection to check the depth of the foundation footings. If they’re not deep enough, you might need to add new footings, which involves digging under the current foundation. It’s a good idea to discuss this with your contractor to estimate potential costs.

Renting an ADU

You can rent out your ADU to a tenant even if you don’t live on the property. However, you cannot sell the ADU separately from your main house.

Sewer Line

The city usually requires a new sewer line connection from your ADU to the main sewer line in your front yard. It’s best to have your contractor locate and check the depth of the existing sewer line. Running the new line through dirt is cheaper than through a concrete driveway, which would need to be dug up and repaired.

DWP Powerlines

If power lines from the Department of Water and Power (DWP) run over your garage, the city might not allow the conversion. You can ask DWP about moving the lines, but this can be costly and time-consuming.

Soundproofing

For garages that are attached to your house, consider adding insulation and soundproofing between the ADU and your home to reduce noise.

Outdoor Area & Patio

Adding an outdoor space can make your ADU more attractive. Think about creating a concrete patio or using pavers for seating areas. Landscaping with potted plants can enhance the look, and a patio cover provides shade, though it adds to the cost.

Assessing the Value Added by Garage Conversions

Converting a garage can significantly boost your property’s value, often exceeding the cost of the conversion itself, especially in Los Angeles.

Besides the financial benefits, a garage conversion can improve your daily life. For example, turning your garage into a cozy art studio can offer a quiet space for creativity. Alternatively, converting it into a gym helps you stay fit without leaving home.

Adding a private guest suite also enhances your ability to host and entertain visitors. These lifestyle benefits, combined with the increased property value, make a garage conversion a smart investment for both financial and personal reasons.

ADUs are a great way to add value to your property. Find out how much value could add to your property.

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